Rambo Syndrome

There is no consistent definition for this potentially useful term. It usually refers to various aspects of the character John Rambo, the fictional Vietnam veteran played by Sylvester Stallone in the Rambo franchise of films.
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The theory is that extreme experiences such as thrill sports can help troops overcome what one soldier in the 4th Stryker Brigade called "the Rambo syndrome" -- the emotional need for some of the tension and fear-tinged excitement of combat.